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How to detect the shielding range of mobile phone jammers?

Perfectjammer 2020-12-28

cell phone jammer

How to test the effective shielding distance of the mobile phone signal jammer? Many users say that the jammer is not effective and the actual shielding radius is short, but many of them are caused by incorrect methods. So the editor today will introduce to you an accurate and fast method, how to detect the shielding range of jammers on the spot?

The most feasible method is the field test of multiple mobile phones. The test should not be too one-sided: Use multiple mobile phones with multiple frequency ranges to test the shielding effect of the mobile cell phone jammer on the spot. This is the most convenient, most trouble-free and most feasible test method. Compared with the limitations of passing the mobile phone test software and the need to convert after passing the professional instrument test, this method is the easiest for users to grasp. Methods as below:

Prepare mobile phones with multiple frequency bands, including: China Mobile, China Unicom, PHS, 3G (it is better to have three types of 3G: Mobile TD-SCDMA, China Unicom CDMA2000, Telecom WCDMA), then turn on the mobile phone signal jammer and hold each mobile phone , Test the effective shielding radius of the jammer from near and far from the mobile phone jammer installation position. It is recommended that the user should simultaneously test the shielding distance in multiple directions with the jammer as the origin during testing.

When checking whether the mobile phone is blocked, you should pay attention not to just check the signal grid number on the mobile phone, because the signal grid number on the mobile phone is sometimes false and does not represent the current communication situation of the mobile phone. This jammer has no effect. Instead, you should dial the cell phone intermittently. You can try to dial a local toll-free number or a fixed landline number. If the call fails, it will be judged to be still in the shielding range. Otherwise, the shielding range is out of range.

After testing all the multiple frequency bands, select the shortest shielding radius of a certain frequency band as the effective shielding radius of the mobile phone signal jammer in this area. The position can be estimated based on this when carrying out large-area honeycomb layout.

The above is a very effective and simple way to test the jammer's radius in this environment, but it should not be judged too early. The jammer's shielding effect can only be so far, and it is necessary to check whether there are base stations around. The shielding effect has a great influence. If the jammer can meet the requirements of the examination room, it can be used with confidence.


To test whether a certain point is within the shielding range, hold the mobile phone in this position for more than half a minute to confirm whether the mobile phone is shielded.

If you dial the phone from the unshielded area to the shielded area, you will often walk into the shielded area for a considerable distance before the phone is completely shielded. This is because once the phone is dialed, the phone itself has the ability to resist interference. This kind of anti-interference will make the mobile phone adjust its transmitting power to ensure the normal call this time. Therefore, it is generally not recommended to perform dynamic testing in the call state, but to perform static testing at various points.

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